Αντιγράφω από το User Guide του Translator's Workbench:
Add as New Translation [Ctrl]+[Alt]+[Up arrow]: Adds an additional translation unit with different target text to a translation memory that has multiple translations enabled.
Και πιο αναλυτικά:
Creating Multiple Translations
If you are using a translation memory that allows multiple translations, the Add as New Translation command is available in the Trados menu in Word whenever Translator's Workbench identifies an exact (multiple translation) or 100% match for the currently open translation unit. This allows you to create a new translation for the current source segment which is then stored, along with the original translation unit, as a multiple translation unit in the translation memory. In Word, the Add as New Translation command is available on the Trados menu or as a keyboard shortcut, [Ctrl]+[Alt]+[Up arrow]. When you use this command, the message New translation added successfully. Use "Set/Close" to continue appears in the status bar of Translator's Workbench.
By default, Translator's Workbench applies a 1% match penalty to multiple translations. Accordingly, whenever a multiple translation is retrieved from the translation memory, the message Exact Match, -1% Multiple Translations appears in the status bar of Translator's Workbench.
Δεν καταλαβαίνω ακριβώς τι κάνει αυτή η εντολή και σε τι διαφέρει από το Set/Close σε μια multiple translations μνήμη.